Callum vs Zach
Callum and Zachcompared on official birth-registration statistics and Namewise's recorded data. This page states what each name's record shows — it never picks a winner or scores one name against the other.
Head to head
Ranks are only compared within one published list and one year. Two ranks from different years, from a boys' and a girls' list, or from different registrars are not comparable, so they are not placed side by side.
Republic of Ireland · Boys
In 2025, Callum was ranked #49 and Zach #94 among boys in Republic of Ireland.
Northern Ireland · Boys
In 2024, Callum was ranked #54 and Zach #108 among boys in Northern Ireland.
Scotland · Boys
In 2024, Callum was ranked #62 and Zach #148 among boys in Scotland.
England and Wales · Boys
In 2024, Callum was ranked #248 and Zach #509 among boys in England and Wales.
Callum and Zach over time
Callum and Zach appear together in 3 published lists, across 89 years of shared records. Callum held the stronger position in more years in 3 of them, Zach in 0.
The order between them changed and held in one of those lists — a change in that published list, never a claim that one name displaced the other.
Callum reached its own highest recorded position earlier in 3 of those lists, and Zach in none. Each position is a place inside its own list, so this compares when they peaked and never how high.
Counted list by list. Two names in the same published list are measured on the same scale in the same year, so those comparisons are real — but positions from different lists are not, so nothing here is combined into an overall standing.
How this pair is related
The relationship kinds these two qualify for, each under its own stated rule. Every one is drawn from a list they both appear in.
- Mirrored each other
Over 28 shared years in Northern Ireland · Boys, Zach rose about as far as Callum fell — from #34 and #248 in 1997 to #54 and #108 in 2024.
- Longest-running competitions
Callum and Zach were both ranked in Republic of Ireland · Boys for 32 years, from 1993 to 2025, ending at #49 and #94.
List by list
Republic of Ireland · Boys32 shared years, 1993–2025
Callum held the stronger position in 31 of those years, Zach in 1.
Highest recorded here: Callum #22 in 2006, Zach #81 in 2021.
The order changed in 1994: Callum moved ahead. In 1993 they stood at #339 and #302; by 1994 that had become #225 and #342.
Most recent shared year, 2025: Callum #49, Zach #94.
England and Wales · Boys29 shared years, 1996–2024
Callum held the stronger position in 29 of those years, Zach in 0.
Highest recorded here: Callum #8 in 1998, Zach #167 in 2010.
The order between them never changed and held in this list.
Most recent shared year, 2024: Callum #248, Zach #509.
Northern Ireland · Boys28 shared years, 1997–2024
Callum held the stronger position in 27 of those years, Zach in 1.
Highest recorded here: Callum #8 in 2006, Zach #65 in 2014.
The order between them never changed and held in this list.
Most recent shared year, 2024: Callum #54, Zach #108.
Two names moving past each other in a ranking is a fact about the ranking. Namewise does not claim one name displaced the other, that families chose between them, or that either influenced the other — none of that is in this data.
Where to go next
Comparisons that share a name, a rule or a published list with this one. Each is an existing comparison page with its own evidence — nothing here says these pairs are alike.
Other comparisons involving Callum
Pairs where Callum shares a published list with another name, each measured inside one registrar's own list.
- Callum vs Ross
In 1997 they stood at #34 and #30 in Northern Ireland · Boys, 4 places apart; by 2023 they were #98 and #395.
Callum · Ross · 27 shared years, 1997–2023 · Started together, ended far apart
- Sean vs Callum
Sean and Callum changed places 12 times in Northern Ireland · Boys between 1997 and 2024, ending at #48 and #54.
Sean · Callum · 28 shared years, 1997–2024 · Repeatedly exchanged positions
- Jack vs Callum
Both reached their highest recorded position in England and Wales · Boys within 2 years — Jack #1 in 1996, Callum #8 in 1998.
Jack · Callum · 29 shared years, 1996–2024 · Peaked in the same years
- Michael vs Callum
In 1988, Michael moved ahead of Callum in New Zealand · Boys — #100 and #80 the year before became #2 and #80.
Michael · Callum · 22 shared years, 1988–2009 · One moved ahead of the other
Side by side
| Field | Callum | Zach |
|---|---|---|
| Record type | Editorially researched profile | Official statistical record (evidence-only) |
| Gender usage | male | male |
| Meaning | Traditionally associated with 'dove', via its connection to Saint Columba. | Not yet recorded |
| Origin | Scottish Gaelic (Anglicised form of Calum), from Latin columba | Not yet recorded |
| Pronunciation | /ˈkæləm/ | Not yet recorded |
| Syllables | 2 | 1 |
| Common variants / nicknames | Not yet recorded | Not yet recorded |
| Recorded regional usage | AU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NZ | GB-ENW, GB-NIR, GB-SCT, IE |
| Most recent popularity observation | Republic of Ireland · Boys #49 (2025) | Republic of Ireland · Boys #94 (2025) |
| Pronunciation clarity (demonstration score) | 90/100 | Not yet recorded |
| Spelling simplicity (demonstration score) | 88/100 | 95/100 |
| International familiarity (demonstration score) | 100/100 | 100/100 |
| Data Confidence | medium | medium |
What the data shows
- Callum has a recorded origin (Scottish Gaelic (Anglicised form of Calum), from Latin columba); Zach does not have one recorded yet.
- Callum has 2 syllables, compared with 1 for Zach.
- A meaning is recorded for Callum; Zach doesn't have one written yet.
- Both names have recorded usage in GB-ENW, GB-NIR, GB-SCT, IE.
How each name got here
Callum
Popularity journey
First recorded1988
First recorded at #80 among boys in New Zealand in 1988 — the earliest year that source publishes this name, not necessarily the earliest it was used.
New Zealand · Boys
Highest recorded1996–2024
Highest recorded position: #8 among boys in England and Wales, in 1998 (recorded 1996–2024).
England and Wales · Boys
Most recent2025
Most recently recorded at #49 among boys in Republic of Ireland, in 2025.
Republic of Ireland · Boys
Zach
Popularity journey
First recorded1993
First recorded at #302 among boys in Republic of Ireland in 1993 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Republic of Ireland · Boys
Highest recorded1997–2024
Highest recorded position: #65 among boys in Northern Ireland, in 2014 (recorded 1997–2024).
Northern Ireland · Boys
Most recent2025
Most recently recorded at #94 among boys in Republic of Ireland, in 2025.
Republic of Ireland · Boys